SVARTSJÖ PALACE (P25) (If correct -feel free to delete this post- and if needed for further adventures)
Here is a link to more information on SVARTSJÖ PALACE :
https://en.wikipedia.org/wiki/Svartsj%C3%B6_Palace
and approximate location of earlier castle as it relates to the new palace and existing ruins :
https://en.wikipedia.org/wiki/File:Svar ... 3%A4ge.jpg
Also
http://www.svartsjöslott.se/planskisser/